OF NORTHUMBERLAND AND DURHAM. 145 
“the descriptions had, by some accident, been intermingled in 
the Testacea Britannica.” Specimens sent by Dr. Turton, under 
the name of 7. unidentatus, and now in the Newcastle Museum, 
we find to be O. pallida, though his description in the Con- 
chological Dictionary is correct, being a copy of Montagu’s. The 
species described by Mr. Hanley under this name, in the Zoological 
Proceedings, and in Thorpe’s “ British Marine Conchology,” is, as 
he informs us, the Awricula conoidea of Philippi ; his Odostomia 
plicata being our O. unidentata. The O. unidentata of Mac- 
gillivray, and the figures given by Capt. Brown of his Jaminia 
unidentata, do not appear to belong to this species. 
A variety, if not a distinct species, is found on our coast, ra- 
ther narrower and more rounded at the base, and with a larger 
umbilicus. As we have only met with two rather worn exam- 
ples, we shall not attempt to decide upon it at present. 
2. O. turRita, Hanley. 
Odostomia turrita, Hanley in Zool. Proc., 1843. Thorpe’s 
Brit. Mar. Conch. xxxvi. f. 10. 
In shell-sand at Tynemouth, rare.—J. A. 
3. O. ALBELLA, Lovén. 
Turbonilla albella, Lovén Index Moll. Scand. 19. “T, 
turrito-conica, tenuis, anfr. 6 rotundatis, apertura fere 
At. t., ovata, vix effusa, plica parva, 3:¢-m m.” 
In shell-sand, Tynemouth and Cullercoats, rare—dJ. A. 
Our shell agrees with the outline figure given by Professor 
Lovén in the “ Ofversigt af Kongl. Vetenskaps-Akademiens 
Forhandlingar,” 1846, t. 1. f 11. It is broader and less turreted 
than the last. Both species have the tooth very small. 
There is yet another shell, which we find at Tynemouth, nearly 
allied to these two, and to O. plicata, though apparently dis- 
tinct. It is intermediate in form between O. turrita and O. 
albella, and has a stronger tooth. The species of this difficult 
genus are extremely perplexing, and require a careful study, to 
which their rarity, especially in a living state, presents a great 
obstacle. 
4. O. patuipa, Mont. 
VOL. I. U 
